"All these years went by and nobody came up with any ideas that were anything but corny and kind of low grade, so we just decided probably that wasn't going to happen," Redford said while promoting his new film, An Unfinished Life, directed by Lasse Hallström. "But now there's something rolling around that we're talking about."

The something in question is a film adaptation of A Walk in the Woods, the Bill Bryson comic novel about the 2,000-mile hike the author did with a friend. It would mark the first collaboration between the two actors since 1973's The Sting, which followed 1969's Butch Cassidy and The Sundance Kid.

According to Redford, there was no shortage of proposals for sequels to the two films. "The stuff that came to us wasn't any good," Redford explained. "'Can you do a sequel to The Sting?' No, leave that one alone ... don't try to milk it. 'What about a sequel to Butch Cassidy?' Well the guys died in it, so what's it going to be, a spiritual film?"